Power-hammer.



No. 706,|5l. I Patented Aug. 5, I902. r

W. BAUERMEISTEB.

POWER HAMMER.

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ATTORNEYS No; 706,151. Patented Au fls, 1902'.

w. BAUERMEISTERL POWER HAMMER.

(Application med Feb. 7, i902.

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UNITED STATES PATENT OFEIcEZ WILLIAM BAUERMEISTER, OF COLUMBUS, OHIO,ASSIGNOR TO HAYDEN- OORBETT CHAIN COMPANY, OF OOLUMBUS OHIO, ACORPORATION OF NEIV J E RSEY.

POWER-HAMMER.

SPECIFICATION forming part of Letters Patent No. 706,151, dated August5, 1902.

Application filed February 7, 1902. Serial No. 92,954. 1N0 mqdel-I ToaZZ whom it may concern:

Be it known that 1, WILLIAM BAUERMEIS- TER, a citizen of the UnitedStates, residing at Columbus, in the county of Franklin and 5 State ofOhio, have invented certain new and useful Improvements in PowerHammers; and I do hereby declare the following to. be a full, clear, andexact description of the invention, such as will enable others skilledin the same.

The invention relates to power-hammers'especially adapted for weldingchain-links and other articles of metal.

The object of the invention is to provide a hammer with which heavy orlight blows, as required, can be given.

The invention is embodied in the combination, with a pivoted hammershank or lever, of two or more rotated cams so arranged that they can beshifted to act on said shank or lever to raise the hammer and allow itto drop to strike the blow, the blow being heavy or light according tothe size or radius of the cam acting on the shank or according to thesize of a wheel upon which a cam acts.

The invention further consists in a trip device arranged to release thehammer at the proper point with respect to the cam, so as not to allowthe hammer to drop prematurely, thereby interfering with its properoperation and jarring and possibly breaking or damaging the machine.

In the accompanying drawings, Figure l is a side view of the machine,apart being broken out. Fig. 2 is a rear view, the spring for actuatingthe hammer being omitted. Fig. 3 is a plan view of a detail illustratingthe carnshifting devices. Figs. 4 and 5 show rear and art to which itappertains to make and use the to the shaft '7.

side views of a modified form of devices for.

lover or shankand n15, upper end of a yoke or bracket 3, reaching upwardand rearward from the frame, is a. spring 4:, tending to pull the hammerhead downward with considerable force; but a lever having anupwardly-extending latching-arm 5 and a forwardly-extending footpiece 5is fulcrumed in the lower part of the frame, so that the latching-armcan engage a pin 2 on the side of the hammer-shank tohold thehammer-head normally raised when not performing the operation ofwelding. -A'spring 6, connecting the latching-arm 5 and the frame 1,tends to automatically hold said latching-arm in engagement with saidpin 2 until removed by the pressure of the foot of the operative, andwhen the foot is released from the lever 5 the hammer is automaticallycaught and held in its elevated or striking position. Journaled betweenthe sides of the frame and directly above the antifriction'wheel 2is apower-shaf t 7, on which, as shown in Figs. 1, 2, and 3, are slidablykeyed two cams 8 and 8, one small and the other large, and having theiractive or crescent edges beginning and terminating in the same plane,but ofiset or stepped from each other. The two cams haveoppositelyextending hubs 9, with lateral splines 9 to enterand engagecollars 10, fastened or keyed The cams are thus kept constantly rotatingand can be shifted on the driving-shaft, so that first one and then theother revolves over the ant-ifriction-wheel 2 but normally the largercam is held in position to rotate over the antifriction-wheel by meansof a spring 11, (see Fig. 3,) connecting a non-rotative shifting-ring12, that engages a groove in the, hub 9 and the frame. The cams can beshifted by means of a horizontally-arranged lever 13, the outer end ofwhich is in easy reach of the knee of the operative at the front of themachine and the inner end of which engages a vertical lever 14:, havinghinged to its upper end a rod 15, that is connected to the shifting-ring12.

In order that the hammer-lever shall be releasable for the action of thelarge cam at the proper time, I provide a trip device consisting of alever 16, supported on a pin 16, pro-- jecting from the inner side ofthe frame and weighted at its front portion and having a latsaw,

erally-extending end 16 (see Fig. 2) at its latch-arm 5 can only beremoved from the pin 2 when the trip-lever 16is lifted ofi the latch-armby the action of the small cam 8 on the laterally-extending portion 16of the said trip-lever 16.

In Figs. 4 and 5 I have shown a modification in which I can employ onecam 8 on the power-shaft and two or more wheels 2 of different diameterson the hammer-shank. In this case the cam is to be shifted to act firston one wheel or part and then on the other. In this constructiona pin 17on the cam act uates the trip device 16.

The antifriction roller or rollers in the shank can be omitted and thecam or cams act upon flat or other surfaces on the end of thehammer-shank.

In welding chain-linksor other articles with this hammer the first fewblows can be hard to expedite the work of welding and roughshaping, andby simply shifting the cam or cams with the knee the final blows can belight to nicely finish the shaping.

What I claim, and desire to secure by Letters Patent, is-

'1. In combination with a hammer-shank, means for latching or holdingthe same in elelock for said hammer-holding device, a later-.

allyshiftablecam device for varying the strength of the blows, andmeansfor auto matically operating said lock to permit the release of thehammer-holding device when the cam device has reached a definiteposition, substantially as described.

3. In combination with a hammer-shank, a cam device for-lifting anddropping the same, means for catching and holding the hammershank inelevated or striking position, a lock for said hammer-shank-holdingdevice, and means for automatically operating said lock to permit therelease of the hammer-shankholding device when the cam device hasreached a definite position, substantiallyas described. I

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM B-AUERMEISTER.

